Lantern



' (No Model.)

N. P. TOWNE.

LANTERN.

No. 317,047. M y'5, 1885.

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. r Inventor P Pl li'nes'ses' A. I MM V UNITED STATES PATENT OFFICE.

NATHAN P. TOWNE, OF BROOKLYN, NEWV YORK.

LANTERN.

SPECIFICATION forming part of Letters Patent No. 317,047, dated May 5,1885.

Application filed December 22, 1884. Nb model.)

T0 at whom it may concern.-

Be it known that I, NATHAN P. TOWNE, residing at Brooklyn, in the countyof Kings and State of New York, have invented certain new and usefulImprovements in Lanterns, of which the'following is a specification,reference being bad therein to the accompanying drawings.

This invention relates to lanterns; and it consists in the details ofconstruction and combination of parts hereinafter pointed out andclaimed.

The object of the invention is to produce a lantern in which the airwhich supports combustion shall be heated while passing upward in aflueor pipe in proximity to the heated air in the body of the lantern, andsubsequently passed to the flame, in contradistinction to such as heatthe air while drawing, driving, or forcing it downward against thenatural tendency of heated air to rise. This object I accomplish by suchmechanism as is hereinafter described; but it must be understood thatthe construction may be varied within reasonable limits, the main ideabeing that of heating the air during its upward movement by the heatgenerated in the lantern.

In the drawing forming part of this specification is shown a centralvertical section of a ships standing light with my invention appliedthereto.

A B O D indicate the outline of the lantern proper, the door a being infront, as usual.

- The back plate, 12, of the lantern has a flue, O,

leading upward, the walls of the flue in contact with the heated air inthe lantern. This flue opens to the external air at or near the bottomof the lantern-as, for instance, at 0'- and the flue presents a broadsurface to the lantern-plate b. The flue O connects at G with a downwardflue, P, which leads into the body of the lantern at H K below the levelof the top of the burner. The lamp-body I L is supported a little abovethe bottom of the lantern on brackets or ledges c c, and has a centralpassage around the wick-tubes M M,which tubes are supplied with oil fromthe lampbody by tubes 6 e. A single apertured deflectingcone, f,surmounts the wick-tubes. The tubes may be braced, if necessary; but theoil-tubes will usually furnish a suiflcient plate of the lantern, itmust be understood that this is not essential. The flue may be in anypart of the lantern. The external a1r which enters the flue O is heatedby cont-act with plate I), and is driven upward. Passing over the top ofthe diaphragm, the heated current is impelled down the flue P and intothe space under the lamp. The heated air then passes upward around thewick-tubes, being concentrated by the cone in the vicinity of the flameat the top of the burners. The escaping air passes out at the chimney h.

The general direction of the air-currents is indicated by the arrows onthe drawing.

It is common in lanterns to take in exter nal air near the top of thelantern, and the air thus taken in is heated while passing downward. Inlanterns of this kind the instant the door is opened cold air rushes in,cooling down the lamp, and as the flue is still heated the draft isinstantly reversed, and air is drawn down through or past the burner andout at the flue. This difficulty is overcome in my construction, which,being more in accord with natural laws, is more effective at all times.

I claim- 1. Alantern having an air-chamber beneath the burner andconnected therewith, an airflue communicating with the external air nearthe bottom, extending upward in contact with the contained air in thelantern-body, then leading downward and opening into said airchamber,substantially as described.

2. In combination with a lantern-body hav burner therein, and a flueleading upward in contact with the contained air in the lantern, thendownward, and communicating with said central aperture below the burner,substanreservoir from below, all substantially as de- 10 vtially asdescribed. scribed.

4. In combination with a lantern-body, a In testimony whereof I affix mysignature in contained oil-reservoir having a central aperpresence oftwo witnesses. 5 ture and a plurality of fiat Wick-tubes thereinsurmounted by a single cone, and a flue lead- NATHAN TOWNE' ing firstupward in contact with the contained Witnesses: air in the Iantern-body,and then downward ALFRED O. BLAISDELL,

and communicating with the aperture in the U. M. E. KIsBY.

